Tool mechanism for gear-cutting machines



s t. 27 O. p 1927 M. H. JOHANSON TOOL MECHANISM FOR GEAR CUTTING MACHINES 4 Smets-snee; J,

Filed Dec. 50, 1925 Se 't". l

p 27 927 M. H. JoHANsoN TOOL MECHANISM FOR GEAR CUTTING lMACHINES 1925 4 sheets-sheet 2 Filed Dec. 30

INVENTOR t 1,643,813 Se? 27 1927 M. H. JoHANsoN TO0L`MECHANISM FOR GEAR CUTTING MACHINES Filed Dec. so, 192s 4 Sheets-sheet s Y :n l v 'l l l zgmronN sept. '27, 1927.

M. H. JOHANSON TOOL MECHAISM vFOR AGEAR CUTTING-MACHINES i Filed neo. so. 1925 4 Sheets-Sheet 4 Hmm INVENTOR jgza-wmsom ZJSATTORN Patented Sept. 27, 1927.

taarten STATES Mac-mos @To ROCHESTER, NRW'YORR, A-

HAiIs'oiL'oRfRocHRsTERQNEW YORK, Ass

CORPORATION or NRW' YORK.

'root MRGHAN'ISMFORenitncozbrnie iviacinixiiisf' -f, Application filed December The subject. ofthe present' invention is'fa tool mechanismJ particularlya tool'mechanisin vfor gearcuttingniachines,

@neobjectofthisinve.

5 means. for. positively tool to and; from cutti points. in its st1ol;e. JA urtlier,olojec vide means where anism. may` he actuate timed relation to the me eating th e tool.

Another oh'ect of this invention isto pref videineans for positively and completely withdrawing atool fromI cuttingl position atr the finish oi'i itsv cutting stroke.

A still-further objectotV the invention is'to provide in a tool 1nechanism means for.' positively locking the tool in 3utting position so as to obviate chatter. duri stroke` ng the 'cutting Further object apparent h ereina and from the rec claims..v Y

ln theL drawings have illustrated one preferred einhodimentot invention. It will' he understood, however,v thatfthis invention is'capable ot various turtherfinoditica tions withinlits scope van ot the appended claims.

In the clra\vings Fig. l is a partiall gear cutting machine which` is provided with a tool mechanism constructed.according to one embodinientoff'my invention; Fig. -2 is a side elevation otthet'oo of this `machlne'; y v v `Fig.v 3 is a plan view'ofthe sameshowing the t'ool in cutting pt )sition` tion` is 11g position 'at desired by the tool clapping meca d` I ini pred chanisin for recipio s ot the invention wilif ybe tten from the specication ital ot the accompanying l head Fig. lis a transverse sectional view ofthe head showing the tool in" non-cutting posi` tion;A

Fig. Fia-2;A

Fig 6 a detail of part 'ot' the tool clap! ping1nechanism5 on'on'tlie line 7-"47 ot Fig.

`-is a section on`I the linev :3f-5 of Fig. -s a secti 6 and Fig.

thev clapping; mechan The present infventi for reciprocati wokbianl and.

ing the tool roin 8 is alaylout ofthe cam controlling 0n provides mechanism' tor automatically withdraw! and returning it to'cutting to provideA metete' e fliefet'e ent inventonfSerial No. 70,8645 ilediNovem] y detietQQdthev-g. t of the. invention'istoprogloynientV with d within the limitsI iange 18 otth'etoo sectional view through a' v position of. angular ng a tool acros'sfthev face ofthe' "eo, 1925. sertai No. 78,3591

vpositio-n at pr 'tingstrpke suited yfor employinen chines, such.:y deserti applicationo Candee and thepres loer 23rl,'19251 It will-.lo un "ever, that itis o apahl'e 'o tf.,emp ffvariou's .otherimahines i Referring tothe drawings reference., Y1 i whichY is reciprocal) L The. guide il() may b adjustments'y perniit ot positioningnthe tool in correet r elation to. I

, geaf-bl`ank toi suchy las described" in the applic lreferred to. Forv thefpu-rpose o justments, block 13, is mounted upon a clappei'hlock ywhich*ispivfojtally mounted upontlie clapper port., 15A is angular `vided with an arcuate suifac in a correspondingly arcuate bedformed'inthe be cutso as t'o. produce a` geen t' vthese adate surfaces aree lies inrit-he cutting any adjusted position thetool' will havetheI ,propeiplearance l i i' Yerly po sivtionting .iustment' the. tOOl. hea provid 4d1 vwith graduati againstan index` mark 'clapper block suppe through arcuateslots inthe tlange. 1 8 and are in threaded engageinen block Ysupportfserve to retain the adjustment.

the tool in its ang on the tace Vofthe f-The tool' head 1.6 is laterally `head s lide `ll. For the pu this last adjustment a' sha numerals L iGNoR To GLEAsoN wonkstfon edeterniinedl periods in Thisinientionlis' particularly. t with' eeat'c'ftame-g bed "in" the, @Rendim ar adjustment on the toot ation above lhe'ad'ltf. 'The two arcuf ryed kabout a-Piat which. edgeoi the tool. so that in .For the purposeof pi'op'f d' -fla'lae 1S may be ons which .register adjustable. .en th teal... rp'ose .oit effecting provided which j'ournal'ed in the hea/ d 16j;

iand which carries a pinion 2l vv'hich'ineshesjl Vwith the 1) ywhich'is secured" to `the t.ool head' slide 'ill'. Thesetwo adjustlments'are'tor thep'urpose'oif' i tool tor use oni a machine'as d Labove mentioned application.-

escrihed in the' The adjustlos A) a Ul) ments of the tool form no part of the present invention and may be of any suitable character.

The tool head 16 is reciprocated in the guide 10 to move the tool across the face of the Work to be operated upon, by means of a crank disc 25 which is secured to the spindle 26 which is journaled in the frame of The machine. The crank disc may be driven from any suitable source of power by any suitable means. The drive means shown include the shaft 27 (Fig. 1), the bevel gears 28, the shaft 29, the pinion 30 and the bevel gear 31 which is secured to the crank disc. The slide 11 is connected with Athe crank disc by thel connecting rod 32 and the connecting pins 33 and 34. The pin 54,' is' adjustably mounted upon the crank disc to permit variation inthe stroke of the tool. For tl is purpose the pin 34 is carried on a block 35 which is adjustable in a slot 36 formed in the face of the disc by means of a screw 37 which is carried by the disc and threads into the block 35. From the mechanism just f described, it will be seen that as the crank disc 25 rotates, the tool will be reciprocated back and forth in the guide 1l.

One of the principal features of this invention is the mechanism whereby the pivotal movement of the clapper lock necessary to move the tool to and from cutting position is timed with the tool reciprocation.

For the purpose of operating` the lclapper block, a cam 38 is preferably employed. This cam will be preferably in the forni of a groove 38 in the periphery of the crank disc 25 Hence as the crank disc rotates the cam will rotate and the two cannot get out of their predetermined timed relationship.

The camV 38 serves to withdraw the tooi from and to return it to cutting position at the desired points in the tool stroke through he mechanism now to be described. Slidably mounted in a sleeve 40 secured to the frame 12 is a rod 41 which carries at one end a roller 42 which engages in' the. cam slot 38. rihis rod 41 has a flexible connection as Vby means of springs 43 with a sleeve 44 to which are secured or with which are formed integral a pair of racks 45 which mesh with a pair of pinions 46 preferably formed integral with sleeve members 47 vwhich are journaled in the sleeve 40.

Each sleeve member 47 is provided at one en d with a socket 48 which is adapted to receive the stud portion 49 of one member 50 of a universal joint connection 51 between the sleeve member 47 and theA telescoping shaft 52. The universal joint member 50 may be secured to either sleeve member 47 by the bolt 53, both sleeve members being suitably bored to receive this bolt. l A

The telescoping shaft 52 is connected by another universal joint 54 with a shaft 55 (F ig. 2) which is journaled in the clapper block support 15 and which drives through the bevel gearing 56 a shaft '57 also journaled in the clapper block support- This shaft 57 carries a pinion 58 which meshes with a movable rack 59 whichrslides in groove 60 (Fig. 8) provided therefor in the clapper block support 15. The rack 59 meshes with a segmental spur gear 61 to which is secured the pin 62 which is fastened to a block G3 which is adapted to slide in a slot 64 formed in the clapper block The arrangement is such that the tool is swung to and from operative position by the reciprocating movement of the rod 41 under actuation of the cam 38, the reciprocating movement of this rod 41 being transmitted through one rack 45, one pinion 4G, the telescoping shaft 52, the bevel gearing 56,*the shaft 57, the pinion 58 andthe `rack 59 to rthe segmental gear 61 which oscillates the clapper block 14 about its pivot 65. The pivotal movement of the clapper block is maintained at all times in the desired timed lrelation with reference to the reciprocating movement of the tool so that when the'tooi has finished its4 cutting stroke the clapper block is swung about its pivot to move theV tool from cutting position and when the tool has completed its return stroke the clapper block is again swung about its pivot to return the tool to cutting position.

rEhe two racks 45 and the two pinions 4G are provided to permit of swinging the clapper block in either' direction at either end of the tool slide stroke, as it maybe desired to cut on a pull stroke of theV tool. or on a push stroke. By connecting theV universal joint member 50 with either of the pinions 46, as desired, the clapping movement can be accomplished at theproper `point in the cutting stroke, as will be read ily understood.

One feature of this invention is the means for locking the tool in cutting position so as to prevent chatter during the cutting operation. To this end, a toggle member 66 is provided (Figs. 3 and 4) which is pivotally mounted on the rack 59. This toggle member is adapted to seat in a recess 57 formed in the clapper block 14 when the tool is in cutting position to clamp the clapper block securely in its forward posi-V tion with the projection 68 formed on the clapper block firmly seated against the face of the lug 69 which is fastened to the clapper block support 15. The rack 59 will occupy the position shown in Fig. 3 when the tool is cutting, with the toggle member 6G engaging in the recess 67. As soon, however, as the rack 59 begins to move through rotation of the pinion 58 to withdraw the tool from cutting position, the spring pressed plunger 70 which is housed in the ciapper block support 15 will force the toggle 66 out of locking position, and thus permit swinging of the clapper bloclrabout'its pivot 65. Tlie4 tool' is shown completely ivitlidraiv'n in' Fig. l.

A layout oi tlie cam 38 is slioivn in Fig. 8.-

lVliile l have descr'ib'ednnyinvention 'in' connection with a.' specific structureyit is to be understood that tlieY inventionV is capable of various l'ui'tliei" modificationswithout'departing Yfrom its scope'andtliatthis appli.-

cationis intended to cover any adaptations or embodiments" following, in general, tlie principlesM of' the invention and including sucli departures 'from the present disclosure yas come 'Within lnoiv'nor customary in the gear art aiidmay be` applied'to tlie successful features lliereinbeforel set 'lortli and as lal'l ivitliin'tlfi'e scope `of tlie invention or the limits of the appended claims.

Having` tliusdescribed my invention, what I claim, is:

latable member 'i'vitlrsaid c'lapper block, and

means operatively connected with saidy tool slide' reciprocating meansl lior oscillating said member, at determinatepointsv in tli'e tool movement, to inove'tlie clapperblocl; about its pivot. f

2. The combination iitliHa tool slide, ol

a clapper blorlcpivotally Vmounted onl said f' slide, a tool secured to said clapper block;- acrank disc and connectingjrod forrecipro* eating said slide, anv oscillatable member-,r

means including` apin carried by said os-y cillata'ble member and v`a `block movable in a slot in said clamer blocl'toi oaerativel l l l Y connecting said' oscillatable -member'ivitli said clapperbloclr, and a cam, rotatable with" said crank disc, ,controlling the oscillatable movement of saidmeiiiber.4

3. The combination' with a reciprocating tooll slide, of a' clapper block pivotally mounted on saidslide, a' tool secured to said clapper block, an oscillatablem'ember, a pin secured to said member eccentrically oi its axis, a block mounted on said pin Jfor movement in a slot formed in said clapper block and means for oscillating` said member to move the clapper block on its pivot.

ll. The combination ivitlifa reciprocating tool slide, of a clapper 'bloclr pivotal-ly mountedv on said slide', tool secured to said clappei' block a reciprocable member,

an oscillatable member operatively con-y nected` with' said reciprocable member andy adaptedV onv movement" oi" said Y'recprocable member to move said clapper block about. its pivot and means carried by said reciproca'ble member acting ivli'en the reciprocable ,connecting said- -raclr' and -cla-pperr clapperblock and 'means 'practise inembeii'is at one limitol` its movementito` loclzsaid clapper block and tool in cuttingIv f position.

5. The combination ivitliV a reciprocatiiig:`v

tooly slide",= of a clapper bloclifpivotall-y mounted' on said slidegfa tool ssecured` to said@ clapper block,

a reciproca-tory rack',` gearing biock and controlling'tli'e pivotal; movement oi' sa'fid* carried by said* rack adapteelto engage saidelappen blook'* lat one limit oiv tlie rack movement/to lock@ saidlclapper block and tool =incu-tti-ngl posi'4` f- 6. Tlie combination with a-reciprocating@ tool slide and means 'for operatingA the same',

of a clappei block pi-votally 'mounted-on" lsaid slide', a tool'secured to said clapperHV block, reciprocatory'rack, gearing connect-1i ing` said'i'ack and 'clapp'erbl'o'clr for moving i said clapper blocken its Ypiv'ot onni'ovement# of said rack, means carriedfby'saidrack adapted to engage saidv clappe'r'lblock at one limit ol" tlie iat-l; -inovement -to lock-"said"-y clapper bloei; and tool in cutting position-*- and means for ijneriodically'"-ieciprocatingfYf said rack, said means'being-'operatively conf ineans.

T. The combinati-on ivitliav recipi'"ocating tool slide and means "lor operating the same,

Anected- `with said tool lslide Y reciprocating ci a clappei bloclrpivotally in unted on said f slide, a tool secured to said clapper block, a'

i'eciprocatoi'y rack, gearing connecting said* rack and clapper 'block' for moving vsaid clapper block` on its pivot yon movement ol said rack, means carried by said rack adapted tovenga'ge said clapperbloclr at one limitot tli'e racl; movement to'locksaid'elapperblock and tool in cutting` position and acam operatively connected ivitli saidvtool slide reciprocating means ifor controlling tlie movement oit said rack.

8. The combination ivitli a-freciprocating itool slide, acrank rdisc and coiinecting'rod lor operating'tl'ie same, of ay c'la'pp'er block pivotally mounted yonsaid slide, av tool se cured to said clapper block, a reciprocatoiy rack, gearing connecting said racl; and clapper` block for moving said clapper block onits pivot on movement ot said rack, means carried rby Said raclradapted to engagmsaid clapper block at one limit ot-tlie rack movement to lock said clapper block and tool in cutting position and acam secured-.to said 'f crank disc toi' controlling` tlie movementV of- =sa1d rack.

9. The combinationA ivitli a iecipri'icating;

tool 4 slide, of a clapper block pivotally@ mounted on said slide, a tool secured to said I' vclapper block, a reciprocatoryv` member,

means connectiiigl said i'eciprocatory inem-"1 'ber With said clapper block for moving 'saidf"V -clapper block on its pivot, and a togglese;v cured to' said iecip'r'ocatory memberadaptedv to be engaged in a recess in said dapper block when said reciprocatory member reaches one limit of its movement to lock the dapper block in cutting position.

10. The combination with a reciprocatory tool slide, of a dapper block pivotally mounted on said slide` a tool secured to said dapper block, a reciprocatory member, means connecting said reciprocatoiy member with said dapper block for moving the dapper block on its pivot, a toggle secured to said recipi'ocatoi'y member adapted to be engaged in a recess in said dapper block when said reciprocatory member reaches one limit of its movement to lod; the dapper block in cutting position and means adapted to `force the toggle member from locking position when the reclprocatoi'v member starts to move in the opposite direction.

11. The combination with a reciprocating tool slide and means for operating the same, of a dapper block pivotally mounted on said slide,'a tool secured to said dapper block, two gears rotatable in opposite directions, means adapted to be connected with either of said gears for moving said dapper block on its pivot and means operatively connected with said tool slide reciprocating means for periodically rotating said gears.

l2. rllhe combination with a reciprocatory tool slide, means for operating the same, a dapper block pivotally mounted on said slide, and a tool secured to said dapper block, of a reciprocable rod, a pair of racks carried by said rod, two gears meshing with said lracks and adapted to be driven in opposite directioiison reciprocation of said rod, a lug connected with said rod, a rotary cam member having an operative connection with said lug, and means adapted to be connected with either of said gears for moving the dapper block on its pivot.

13. The combination with a reciprocating tool slide, means for operating the same, a dapper block pivotally mounted on said slide, and a tool secured to said dapper block, o f means for moving the dapper block about its pivot comprising a reciprocable rod, a pair of racks carried by said rod, two gears meshing` with said racks and adapted to be driven in opposite directions on reciprocation of said rod, a lug connected with said rod, a rotary cam member having an operative connection with said lug, an oscillatory member, means connecting said oscillatory member with said dapper block, a telescoping shaft capable of being secured to either of said gears and gearing connecting said telescoping shaft with 'said oscillatory member.

141. The combination with a reciprocatory tool slide, means for operating the same, a dapper block pivotally mounted on said slide, and a tool secured to said dapper block, of a reciprocable rod, a pair of racks carried by said rod, two gears meshing with saidk racks and adapted to be driven in opposite directions on reciprocation of said rod,

with said lug and operatively connected with said tool slide reciprocating means.

15. The combination with a reciprocating tool slide, of a dapper block ApivotallyV mounted on saic slide, al tool secured .toy said dapper block, a reciprocable member, andA an oscillatable member operatively engaged therewith, said members being so connected that movement of one causes movement of the other, means for periodically moving one of said members, means'on the oscillatable member adapted on movement thereof to rock said dapper block abont'its pivot, and means on said reciprocable member acting, when the reciprocable member is at one limit of its movement, to lock said dapper block and tool in cutting position.

16. The combination with a reciprocating tool slide, of a dapper block pivotally mounted on said slide, a tool secured to said dapper block, a reciprocable member, andV an oscillatable member operatively engaged therewith, said members being so connected that movement of one causes movement of the other, means for `periodically moving one of said members, means on the oscillatory member adaptedon movement thereof to rock said dapper'blodr about its pivot,

and a toggle secured to said reciprocable member adapted to be engaged in a recess in said dapper block when said reciprocable member reaches one limit of its movement to lock the dapper block in cutting position.

17. The combination with a reciprocating tool slide, and a crank disc andconnecting rod for reciprocating the same, of a clappei' block pivotally mounted on said slide, a tool secured thereto, means for moving said clapper block periodically about its pivot including a cam member secured to said crank disc, a rod operatively connected with said cam member and reciprocable oii rotation thereof, a telescoping shaft, gearing operatively connecting said shaft to said rod adapted to oscillate said shaft on reciprocation of said rod and gearing operatively connecting said shaft with said dapper block adapted to oscillate said dapper blodr about its pivot on oscillation of said shaft.

18. The combination with a reciprocating tool slide, and a crank disc and connecting rod for reciprocating the same, of a dapper block pivotally mounted on said tool slide, a tool secured thereto, means for moving said dapper block periodically about its pivot including a cam member secured to said crank, a rod operatively connected with said llU cam member and reciprocable on rotation thereof, a telescoping shaft? gearing operatively connecting said shaft to Said rod adapted to oscillate said shaft on reciprocation of said rod, an oscillatable member, a reciprooable member, gearing connecting these two members adapted to move one on movement of the other, means operatively connecting said telesooping shaft With one of l 10 said members adapted to move one of said members on oscillation of said shaft, a pin and block connection between said oscillatory 'member and olapp'er block adapted on oscillation of said member to move the olapper block on its pivot and `means carried by said reoiprocable member acting When the reciprooable member is' at one limit of its movement to lock said clapper block and tool in cutting position.

MAGNUS H. JOHANSON. 

